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32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
/* Define MALLOC_ALIGNMENT for malloc. Generic version.
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Copyright (C) 2017-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _GENERIC_MALLOC_ALIGNMENT_H
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#define _GENERIC_MALLOC_ALIGNMENT_H
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/* MALLOC_ALIGNMENT is the minimum alignment for malloc'ed chunks. It
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must be a power of two at least 2 * SIZE_SZ, even on machines for
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which smaller alignments would suffice. It may be defined as larger
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than this though. Note however that code and data structures are
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optimized for the case of 8-byte alignment. */
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#define MALLOC_ALIGNMENT (2 * SIZE_SZ < __alignof__ (long double) \
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? __alignof__ (long double) : 2 * SIZE_SZ)
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#endif /* !defined(_GENERIC_MALLOC_ALIGNMENT_H) */
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